Merge pull request #2747 from mdboom/fix-masked-recarrays-with-objects

cannot access masked array rows with np.object dtype (Fixes #2432)

2 files changed, 13 insertions, 2 deletions

diff --git a/numpy/ma/core.py b/numpy/ma/core.py
index 7e1a7d89d..dbd619b80 100644
--- a/numpy/ma/core.py
+++ b/numpy/ma/core.py
@@ -5554,8 +5554,7 @@ class mvoid(MaskedArray):
     #
     def __new__(self, data, mask=nomask, dtype=None, fill_value=None):
         dtype = dtype or data.dtype
-        _data = ndarray((), dtype=dtype)
-        _data[()] = data
+        _data = np.array(data, dtype=dtype)
         _data = _data.view(self)
         if mask is not nomask:
             if isinstance(mask, np.void):
diff --git a/numpy/ma/tests/test_mrecords.py b/numpy/ma/tests/test_mrecords.py
index 1e14042b0..c8d9b0a46 100644
--- a/numpy/ma/tests/test_mrecords.py
+++ b/numpy/ma/tests/test_mrecords.py
@@ -502,6 +502,18 @@ class TestMRecordsImport(TestCase):
         assert_equal(mrec.f3, d)
         assert_equal(mrec.f3._mask, m)
 
+
+def test_record_array_with_object_field():
+    """
+    Trac #1839
+    """
+    y = ma.masked_array(
+        [(1,'2'), (3, '4')],
+        mask=[(0, 0), (0, 1)],
+        dtype=[('a', int), ('b', np.object)])
+    x = y[1]
+
+
 ###############################################################################
 #------------------------------------------------------------------------------
 if __name__ == "__main__":